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BROTLI(1)                        User commands                       BROTLI(1)

       brotli - brotli, unbrotli - compress or decompress files

       brotli [OPTION|FILE]...

       unbrotli is equivalent to brotli --decompress

       brotli  is  a  generic-purpose lossless compression algorithm that com‐
       presses data using a combination of a modern variant of the LZ77  algo‐
       rithm,  Huffman coding and 2-nd order context modeling, with a compres‐
       sion ratio comparable to the best currently  available  general-purpose
       compression  methods.  It  is  similar in speed with deflate but offers
       more dense compression.

       brotli command line syntax similar to gzip (1) and  zstd  (1).   Unlike
       gzip  (1),  source  files  are  preserved by default. It is possible to
       remove them after processing by using the --rm option.

       Arguments that look like "--name" or "--name=value" are options.  Every
       option has a short form "-x" or "-x value". Multiple short form options
       could be coalesced:

       · "--decompress --stdout --suffix=.b" works the same as

       · "-d -s -S .b" and

       · "-dsS .b"

       brotli has 3 operation modes:

       · default mode is compression;

       · --decompress option activates decompression mode;

       · --test option switches to integrity test mode; this option is equiva‐
         lent  to "--decompress --stdout" except that the decompressed data is
         discarded instead of being written to standard output.

       Every non-option argument is a file entry. If no  files  are  given  or
       file is "-", brotli reads from standard input. All arguments after "--"
       are file entries.

       Unless --stdout or --output is specified, files are written  to  a  new
       file whose name is derived from the source file name:

       · when  compressing, a suffix is appended to the source filename to get
         the target filename

       · when decompressing, a suffix is removed from the source  filename  to
         get the target filename

       Default suffix is .br, but it could be specified with --suffix option.

       Conflicting or duplicate options are not allowed.

       · -#:
           compression  level  (0-9);  bigger  values cause denser, but slower

       · -c, --stdout:
           write on standard output

       · -d, --decompress:
           decompress mode

       · -f, --force:
           force output file overwrite

       · -h, --help:
           display this help and exit

       · -j, --rm:
           remove source file(s); gzip (1)-like behaviour

       · -k, --keep:
           keep source file(s); zstd (1)-like behaviour

       · -n, --no-copy-stat:
           do not copy source file(s) attributes

       · -o FILE, --output=FILE
           output file; valid only if there is a single input entry

       · -q NUM, --quality=NUM:
           compression level (0-11); bigger values cause  denser,  but  slower

       · -t, --test:
           test file integrity mode

       · -v, --verbose:
           increase output verbosity

       · -w NUM, --lgwin=NUM:
           set LZ77 window size (0, 10-24) (default: 22); window size is
           (2**NUM  -  16);  0  lets compressor decide over the optimal value;
           windows size improve density; decoder might require  up  to  window
           memory to operate

       · -S SUF, --suffix=SUF:
           output file suffix (default: .br)

       · -V, --version:
           display version and exit

       · -Z, --best:
           use best compression level (default); same as "-q 11"

       brotli      file      format     is     defined     in     RFC     7932

       brotli  is   open-sourced   under   the   MIT   License   https://open‐

       Mailing list:!forum/brotli

       Report bugs at:

brotli 1.0.0                     February 2018                       BROTLI(1)
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